Gypsum
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....-2.32. Gypsum occurs in all parts of the world, and is used as a dressing for soils, for making plaster of Paris, etc., salenite, alabaster, and satin-spar are varieties." In another latest edition of Webster's Third New International Dictionary of the English Language Unabridged, Volume 1, "gypsum" has been defined as under: "gypsum: 1. a widely distributed mineral CaSO(4)2H(2)O ....
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